Samsung Electronics and Amazon announced an agreement to launch Kindle for Samsung, a custom-built eBook service.

The app will debut in April starting with the Galaxy S5 along with existing Samsung Galaxy smartphones and tablets above Android 4.0 worldwide. As part of the service, Amazon and Samsung will launch Samsung Book Deals, available to anyone using Kindle for Samsung.

Samsung Book Deals provides up to 12 free eBooks a year. Users can choose a free book from a selection of four different titles every month.

Kindle for Samsung offers readers millions of books, newspapers and magazines on their mobile devices including over 500,000 titles which are exclusive to the Kindle Store. Other features include Whispersync, which saves and synchronizes the last page read across devices, so that a reader can always pick up wherever they left off. Time to Read shows how much time it will take to finish a chapter or a book based on personalized reading speed. Worry-Free Archive automatically backs up the user?s Kindle books to the cloud, so that they never need to worry about losing their books.

Kindle for Samsung is immediately available in over 90 countries from Samsung apps.